Smoke, flame, critical temperature and rate of temperature rise detector
First Claim
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1. AN ELECTRICAL CIRCUIT COMPRISING:
- A SOURCE OF REGULATED D.C. VOLTAGE;
FIRST AND SECOND PHOTOCONDUCTIVE DEVICES CONNECTED IN SERIES ACROSS SAID SOURCE;
A RESISTANCE LOWER THAN THE DARK RESISTANCE OF SAID FIRST PHOTOCONDUCTIVE DEVICE CONNECTED IN PARALLEL WITH SAID FIRST PHOTOCONDUCTIVE DEVICE;
A GROUNDED EMITTER, TRANSISTORIZED DIFFERENTIAL AMPLIFIER ELECTRICALLY CONNECTED TO RECEIVE THE VOLTAGE ACROSS SAID SECOND PHOTOCONDUCTIVE DEVICE AS ONE INPUT THERETO;
A THIRD PHOTOCONDUCTIVE DEVICE CONNECTED IN SERIES WITH A RESISTANCE ACROSS SAID SOURCE, THE VOLTAGE ACROSS SAID THIRD PHOTOCONDUCTIVE DEVICE BEING DIRECTED AS A SECOND INPUT TO SAID DIFFERENTIAL AMPLIFIER;
MEANS FOR DIRECTING BEAMS OF LIGHT OF CONTROLLED INTENSITY UPON SAID SECOND AND SAID THIRD PHOTOCONDUCTIVE DEVICES;
A CONTROL-RECTIFIER CONNECTED IN SERIES WITH AN INDICATING CIRCUIT ACROSS SAID SOURCE;
A TRIGGER ELECTRODE EMBODIED BY SAID CONTROL RECTIFIER;
MEANS FOR COUPLING THE ELECTRICAL OUTPUT OF SAID DIFFERENTIAL AMPLIFIER TO SAID TRIGGER ELECTRODE;
CRITICAL TEMPERATURE RESPONSIVE SWITCHING MEANS;
RATE OF RISE OF TEMPERATURE RESPONSIVE SWITCHING MEANS;
AND MEANS CONNECTING SAID CRITICAL TEMPERATURE SWITCHING MEANS AND SAID RATE OF RISE OF TEMPERATURE SWITCHING MEANS BETWEEN SAID TRIGGER ELECTRODE AND A SOURCE OF ELECTRICAL ENERGY, WHEREBY CLOSING OF EITHER OF SAID SWITCHING MEANS WILL ENERGIZE SAID TRIGGER ELECTRODE TO RENDER SAID CONTROL RECTIFIER CONDUCTIVE.
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1 Claim
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1. AN ELECTRICAL CIRCUIT COMPRISING:
- A SOURCE OF REGULATED D.C. VOLTAGE;
FIRST AND SECOND PHOTOCONDUCTIVE DEVICES CONNECTED IN SERIES ACROSS SAID SOURCE;
A RESISTANCE LOWER THAN THE DARK RESISTANCE OF SAID FIRST PHOTOCONDUCTIVE DEVICE CONNECTED IN PARALLEL WITH SAID FIRST PHOTOCONDUCTIVE DEVICE;
A GROUNDED EMITTER, TRANSISTORIZED DIFFERENTIAL AMPLIFIER ELECTRICALLY CONNECTED TO RECEIVE THE VOLTAGE ACROSS SAID SECOND PHOTOCONDUCTIVE DEVICE AS ONE INPUT THERETO;
A THIRD PHOTOCONDUCTIVE DEVICE CONNECTED IN SERIES WITH A RESISTANCE ACROSS SAID SOURCE, THE VOLTAGE ACROSS SAID THIRD PHOTOCONDUCTIVE DEVICE BEING DIRECTED AS A SECOND INPUT TO SAID DIFFERENTIAL AMPLIFIER;
MEANS FOR DIRECTING BEAMS OF LIGHT OF CONTROLLED INTENSITY UPON SAID SECOND AND SAID THIRD PHOTOCONDUCTIVE DEVICES;
A CONTROL-RECTIFIER CONNECTED IN SERIES WITH AN INDICATING CIRCUIT ACROSS SAID SOURCE;
A TRIGGER ELECTRODE EMBODIED BY SAID CONTROL RECTIFIER;
MEANS FOR COUPLING THE ELECTRICAL OUTPUT OF SAID DIFFERENTIAL AMPLIFIER TO SAID TRIGGER ELECTRODE;
CRITICAL TEMPERATURE RESPONSIVE SWITCHING MEANS;
RATE OF RISE OF TEMPERATURE RESPONSIVE SWITCHING MEANS;
AND MEANS CONNECTING SAID CRITICAL TEMPERATURE SWITCHING MEANS AND SAID RATE OF RISE OF TEMPERATURE SWITCHING MEANS BETWEEN SAID TRIGGER ELECTRODE AND A SOURCE OF ELECTRICAL ENERGY, WHEREBY CLOSING OF EITHER OF SAID SWITCHING MEANS WILL ENERGIZE SAID TRIGGER ELECTRODE TO RENDER SAID CONTROL RECTIFIER CONDUCTIVE.
- A SOURCE OF REGULATED D.C. VOLTAGE;
Specification